class Vector:
    def __init__(self, lst):
        self._values = list(lst)

    def __repr__(self):
        return "Vector({})".format(self._values)

    def __str__(self):
        return "({})".format(",".join(str(e) for e in self._values))

    @classmethod
    def zero(cls, dim):
        return cls([0] * dim)
